日本超导技术专家发现,采用适当热处理的方法可以有效提高二硼化镁的临界电流密度。 据有关媒体报道,科学家开始进行二硼化镁线材的研究开发,起初仅获得5特斯拉磁场中每平方厘米1.2万安培的临界电流密度,与线材实用化所要求的每平方厘米10万安培相距甚远。在开发过程中,科学家发现,对这种金属超导体作适度的热处理,即把热处理时间从一、两个小时缩短到数十秒至 Japanese superconductor experts found that the use of appropriate heat treatment method can effectively improve the critical current density of magnesium diboride. According to media reports, scientists began research and development of magnesium diboride wire, initially only access to 5 Tesla magnetic field per square centimeter of 12,000 amperes of critical current density, and practical requirements of the wire per square centimeter 100,000 amperes far cry. In the development process, scientists found that moderate heat treatment of such metal superconductors, that is, the heat treatment time from one or two hours to tens of seconds to